2004A&A...428...79S

Query : 2004A&A...428...79S

2004A&A...428...79S - Astronomy and Astrophysics, volume 428, 79-88 (2004/12-2)

Ages and metallicities of star clusters: New calibrations and diagnostic diagrams from visible integrated spectra.

SANTOS J.F.C.Jr and PIATTI A.E.

Abstract (from CDS):

We present homogeneous scales of ages and metallicities for star clusters from very young objects, through intermediate-age ones up to the oldest known clusters. All the selected clusters have integrated spectra in the visible range, as well as reliable determinations of their ages and metallicities. From these spectra equivalent widths (EWs) of K CaII, G band (CH) and MgI metallic, and Hδ, Hγ and Hβ Balmer lines have been measured homogeneously. The analysis of these EWs shows that the EW sums of the metallic and Balmer H lines, separately, are good indicators of cluster age for objects younger than 10Gyr, and that the former is also sensitive to cluster metallicity for ages greater than 10Gyr. We propose an iterative procedure for estimating cluster ages by employing two new diagnostic diagrams and age calibrations based on the above EW sums. For clusters older than 10Gyr, we also provide a calibration to derive their overall metal contents.

Abstract Copyright: ∼

Journal keyword(s): galaxies: star clusters - stars: fundamental parameters - techniques: spectroscopic

Simbad objects: 107

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Number of rows : 107
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024 		#notes
1 NGC 104 GlC 00 24 05.359 -72 04 53.20     4.09     ~ 3917 0
2 ESO 28-19 Cl* 00 24 45.98 -72 47 37.9   11.6 12.05     ~ 148 0
3 NGC 121 GlC 00 26 49.0 -71 32 10   11.2 11.24     ~ 311 0
4 Cl Kron 28 OpC 00 51 39.55 -71 59 56.6 10.98 10.56 10.42   10.04 ~ 32 0
5 NGC 330 Cl* 00 56 18.55 -72 27 45.1 9.37 9.76 9.55   8.89 ~ 410 0
6 NGC 362 GlC 01 03 14.26 -70 50 55.6     6.58     ~ 1085 0
7 NGC 419 OpC 01 08 17.26 -72 53 01.8 11.41 11.16 10.50   9.34 ~ 272 0
8 NGC 1466 GlC 03 44 32.71 -71 40 18.0   11.6 11.59     ~ 162 0
9 NGC 1711 Cl* 04 50 37.320 -69 59 01.72   11.22 11.10     ~ 113 0
10 NGC 1783 GlC 04 59 08.590 -65 59 15.84   10.9 10.93     ~ 253 0
11 HD 268850 AB* 05 02 21.4730341272 -66 06 38.294439372   11.83 11.55 12.43   ~ 89 0
12 NGC 1805 GlC 05 02 21.690 -66 06 39.43           ~ 111 0
13 NGC 1831 GlC 05 06 16.12 -64 55 06.9   11.52 11.18     ~ 164 0
14 NGC 1850 Cl* 05 08 50.190 -68 45 35.65   8.84 8.96     ~ 273 1
15 NGC 1855 Cl* 05 09 21.180 -68 50 39.56   10.18 10.39     ~ 78 0
16 NGC 1856 Cl* 05 09 30.290 -69 07 45.08   10.40 10.06     ~ 153 0
17 NGC 1866 GlC 05 13 38.920 -65 27 52.75           ~ 421 0
18 NGC 1851 GlC 05 14 06.76 -40 02 47.6           ~ 1430 0
19 NGC 1868 GlC 05 14 36.60 -63 57 25.7   12.02 11.57     ~ 121 0
20 M 79 GlC 05 24 10.59 -24 31 27.3     8.16     ~ 817 0
21 NGC 1984 Cl* 05 27 40 -69 08.1   10.00 9.99     ~ 78 0
22 NGC 1978 GlC 05 28 45.330 -66 14 12.04   10.7 10.70     ~ 309 0
23 NGC 2004 Cl* 05 30 41.340 -67 17 21.83   9.6       ~ 275 0
24 NGC 2011 Cl* 05 32 19 -67 31.3   10.62 10.58     ~ 71 0
25 NGC 2031 GlC 05 33 41.440 -70 59 14.54   11.09 10.83     ~ 74 0
26 NGC 2100 Cl* 05 42 07.200 -69 12 26.99   9.6       ~ 189 0
27 NGC 2134 Cl* 05 51 55.950 -71 05 53.57   11.05       ~ 72 0
28 NGC 2136 Cl* 05 53 01.800 -69 29 24.24   10.99 10.70     ~ 118 1
29 NGC 2164 OpC 05 58 55.900 -68 30 58.09   10.44 10.34     ~ 123 0
30 NGC 2158 OpC 06 07 26.9 +24 05 56           ~ 294 0
31 NGC 2214 OpC 06 12 57 -68 15.6   11.04 10.93     ~ 119 0
32 HD 46060 V* 06 30 49.8131054472 -09 39 14.800859892   9.03 8.82     B2II 39 0
33 Cl Berkeley 75 OpC 06 49 00.5 -23 59 56           ~ 61 0
34 NGC 2368 OpC 07 20 58 -10 22.7     11.8     ~ 12 0
35 ESO 428-24 OpC 07 22 56.2 -29 30 07           ~ 37 0
36 ESO 429-13 OpC 07 41 03 -30 44.1   11.3       ~ 16 0
37 NGC 2660 OpC 08 42 40.1 -47 12 04   9.05 8.8     ~ 152 0
38 NGC 2808 GlC 09 12 03.10 -64 51 48.6           ~ 1420 0
39 NAME UKS 2 OpC 09 25 15.4 -54 43 08           ~ 40 0
40 Cl Ruprecht 83 OpC 09 49 13.7 -54 36 40   10.26 9.8     ~ 28 0
41 ESO 167-12 Cl* 09 57 51 -54 39.3           ~ 12 0
42 NGC 3293 OpC 10 35 52.8 -58 13 52           ~ 312 0
43 C 1055-614 OpC 10 57 23 -61 44.1   10.12 9.7     ~ 29 0
44 Cl Pismis 17 OpC 11 01 30 -59 52.4   9.63 9.4     ~ 47 0
45 Cl Hogg 11 OpC 11 11 32 -60 22.3   8.21 8.1     ~ 33 0
46 Cl Melotte 105 OpC 11 19 40.8 -63 29 10   9.05 8.5     ~ 76 0
47 ESO 93-8 GlC 11 19 41.9 -65 13 11           ~ 23 0
48 Cl VDBH 132 OpC 12 26 52.8 -64 03 29           ~ 24 0
49 M 68 GlC 12 39 27.98 -26 44 38.6     7.96     ~ 997 0
50 Cl Hogg 15 OpC 12 43 37.4 -63 06 04           ~ 58 0
51 NGC 4833 GlC 12 59 33.92 -70 52 35.4           ~ 425 0
52 M 53 GlC 13 12 55.25 +18 10 05.4     7.79     ~ 836 0
53 Cl Pismis 18 OpC 13 36 54.5 -62 05 28   10.30 9.7     ~ 57 0
54 M 3 GlC 13 42 11.62 +28 22 38.2     6.39     ~ 2479 0
55 NGC 5606 OpC 14 27 47 -59 37.9           ~ 102 0
56 NGC 5824 GlC 15 03 58.612 -33 04 06.70   10.28 9.56     ~ 408 0
57 M 5 GlC 15 18 33.22 +02 04 51.7     5.95     ~ 1978 0
58 NGC 5927 GlC 15 28 00.69 -50 40 22.9           ~ 462 0
59 NGC 5946 GlC 15 35 28.58 -50 39 35.0           ~ 194 0
60 NGC 5999 OpC 15 52 11.0 -56 28 55     9.0     ~ 51 0
61 NGC 6031 OpC 16 07 38 -54 00.8   8.92 8.5     ~ 57 0
62 M 80 GlC 16 17 02.41 -22 58 33.9           ~ 716 0
63 NGC 6139 GlC 16 27 39.987 -38 50 57.03   11.03 9.68     ~ 214 0
64 Cl Ruprecht 119 OpC 16 28 09.4 -51 30 00           ~ 50 0
65 M 107 GlC 16 32 31.86 -13 03 13.6           ~ 786 0
66 NGC 6178 OpC 16 35 45 -45 38.1           ~ 71 0
67 Cl Lynga 11 OpC 16 38 08 -46 17.7           ~ 18 0
68 NGC 6253 OpC 16 59 06.7 -52 42 43     10.2     ~ 186 0
69 NGC 6287 GlC 17 05 09.4906767360 -22 42 28.099250172   11.49 10.30     ~ 224 0
70 NGC 6293 GlC 17 10 10.42 -26 34 54.2           ~ 281 0
71 NGC 6304 GlC 17 14 32.25 -29 27 43.3           ~ 359 0
72 NGC 6318 OpC 17 16 11 -39 25.4     11.8     ~ 29 1
73 Cl VDBH 217 OpC 17 16 17.0 -40 48 54           ~ 32 0
74 NGC 6316 GlC 17 16 37.42 -28 08 24.0   10.33 9.03     ~ 216 0
75 M 92 GlC 17 17 07.39 +43 08 09.4     6.52     ~ 2116 0
76 NGC 6356 GlC 17 23 34.99 -17 48 46.9   10.01 7.42     ~ 350 1
77 NGC 6388 GlC 17 36 17.461 -44 44 08.34           ~ 914 1
78 M 14 GlC 17 37 36.15 -03 14 45.3   9.55 5.73     ~ 386 0
79 NGC 6401 GlC 17 38 36.93 -23 54 31.5   11.31 10.71     ~ 172 0
80 NGC 6397 GlC 17 40 42.09 -53 40 27.6     5.17     ~ 1976 0
81 NGC 6440 GlC 17 48 52.67 -20 21 34.5           ~ 551 0
82 NGC 6453 GlC 17 50 51.77 -34 35 55.1   10.49       ~ 166 0
83 NGC 6517 GlC 18 01 50.376 -08 57 34.39   11.08       ~ 182 0
84 NGC 6520 OpC 18 03 25.4 -27 53 02     7.6     ~ 67 0
85 NGC 6528 GlC 18 04 49.61 -30 03 20.8   12.12 10.65     ~ 524 0
86 NGC 6540 GlC 18 06 08.60 -27 45 55.0           ~ 120 0
87 NGC 6544 GlC 18 07 20.58 -24 59 50.4   11.36 9.90     ~ 296 0
88 NGC 6541 GlC 18 08 02.36 -43 42 53.6           ~ 377 0
89 NGC 6553 GlC 18 09 15.68 -25 54 27.9   9.08       ~ 601 0
90 NGC 6558 GlC 18 10 17.6 -31 45 50           ~ 225 0
91 NGC 6569 GlC 18 13 38.88 -31 49 35.2   10.78 9.47     ~ 238 0
92 M 24 As* 18 16.8 -18 33           ~ 54 1
93 NGC 6603 OpC 18 18 27.8 -18 24 32     11.1     ~ 82 1
94 NGC 6624 GlC 18 23 40.51 -30 21 39.7           ~ 886 1
95 NGC 6638 GlC 18 30 56.25 -25 29 47.1   10.81 9.68     ~ 234 0
96 M 69 GlC 18 31 23.10 -32 20 53.1           ~ 462 0
97 NGC 6642 GlC 18 31 54.23 -23 28 34.1   11.30 10.24     ~ 206 0
98 Cl Ruprecht 144 OpC 18 33 45 -11 25.5           ~ 25 0
99 NGC 6652 GlC 18 35 45.63 -32 59 26.6           ~ 439 0
100 NGC 6705 OpC 18 51 03.8 -06 16 19   6.32 5.8     ~ 411 0
101 M 54 GlC 18 55 03.33 -30 28 47.5           ~ 1069 0
102 NGC 6756 OpC 19 08 43.4 +04 42 40     10.6     ~ 39 0
103 NGC 6760 GlC 19 11 12.06 +01 01 49.7   11.37 9.78     ~ 240 0
104 M 55 GlC 19 39 59.71 -30 57 53.1     6.49     ~ 854 0
105 M 75 GlC 20 06 04.841 -21 55 20.14     8.26     ~ 366 0
106 NGC 7006 GlC 21 01 29.465 +16 11 16.49     10.46     ~ 532 0
107 M 15 GlC 21 29 58.33 +12 10 01.2           ~ 3140 0

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